Influence of Ag-18Cu-10Zn Filler Material on Microstructure and Properties of Laser-Welded Al/Cu Dissimilar Butt Joints.

Dissimilar welding between aluminum and copper poses significant challenges, primarily due to differences in their thermal and mechanical properties, resulting in brittle intermetallic compounds, limited joint strength, and high electrical resistivity. This study aims to overcome these issues by employing Ag-18Cu-10Zn filler material and optimizing laser power with a focus on improving joint strength and electrical conductivity. The results indicate that the incorporation of silver and zinc enhances the phase composition and microstructure of the weld.

Saturable absorption properties and ultrafast photonics applications of HfS.

In this Letter, we focus on investigating the ultrafast photonics applications of two-layer HfS nanosheets. We prepared two-layer HfS nanosheets and carried out experiments to study their nonlinear saturable absorption properties. The results showed that the two-layer HfS-based saturable absorber exhibited a modulation depth of 16.

A mini-review on gene delivery technique using nanoparticles-mediated photoporation induced by nanosecond pulsed laser.

Nanosecond pulsed laser induced photoporation has gained increasing attention from scholars as an effective method for delivering the membrane-impermeable extracellular materials into living cells. Compared with femtosecond laser, nanosecond laser has the advantage of high throughput and low costs. It also has a higher delivery efficiency than continuous wave laser.

InSb-based saturable absorbers for ultrafast photonic applications.

Sb-related III-V compounds have recently gained great research interest owing to their excellent optical and electrical characteristics, which provide many possibilities in photonics and electronics. This study investigated the application of InSb films in ultrafast photonics. An InSb film was fabricated on the tapered zone of a microfiber, and its saturation intensity, modulation depth, and non-saturable loss were determined as 119.

GaSb Film is a Saturable Absorber for Dissipative Soliton Generation in a Fiber Laser.

Nanotechnology is at the forefront of scientific research and offers great prospects for the development of technology. As a type of III-V semiconductor, GaSb materials exhibit numerous outstanding optical and electrical characteristics that are very promising for nonlinear optical device applications. In this study, the electronic band structures of GaSb are theoretically calculated, and its application in dissipative soliton fiber lasers is validated.

Ultrafast Photonics of Ternary ReNbS in Fiber Lasers.

Two-dimensional (2D) transition metal chalcogenides (TMCs) become more attractive upon addition of a third element owing to their unique structure and remarkable physical and chemical properties, which endow these materials with considerable potential for applications in nanoscale devices. In this work, a ReNbS-based saturable absorber (SA) device for ultrafast photonics applications is studied. The device is assembled by placing ReNbS nanosheets with a thickness of 1-3 nm onto a microfiber to increase their compatibility with an all-fiber laser cavity.

WNbSe nanosheets for ultrafast photonics.

Ternary transition metal chalcogenides (TTMDCs), a novel type of two-dimensional (2D) three-element materials, possess multiple physical and chemical properties and have promising potentials in basic physics and devices. Herein, the usage of WNbSe nanosheets as a rising ultrafast photonic device to generate high power mode-locked and Q-switched pulses in a fiber laser is demonstrated. The WNbSe nanosheets were successfully prepared by the liquid exfoliation method with thickness less than 3 nm.

Vanadium disulfide for ultrafast photonic application.

The investigation of two-dimensional (2D) nonlinear optical materials offers a promising way to construct the high-performance optical devices in fundamental and industrial applications because of their rich distinct optoelectronic properties. Herein, by utilizing the liquid exfoliation method, vanadium disulfide (VS) nanosheets are prepared and the thickness is measured to be 3.16 nm.

Niobium disulfide as a new saturable absorber for an ultrafast fiber laser.

Group VB transition metal dichalcogenides (TMDCs) are emerging two-dimensional materials and have attracted significant interests in the fields of physics, chemistry, and material sciences. However, there are very few reports about the optical characteristics and ultrafast photonic applications based on group VB TMDCs so far. In this work, we have calculated the niobium disulfide (NbS2) band structure by the density functional theory (DFT), which has revealed that NbS2 is a metallic TMDC.

Effects of Different 980-nm Diode Laser Parameters in Hepatectomy.

Background And Objective: Despite the successful application of laser in animal experiments and clinics, the adjustment of laser parameters during surgery is still unclear. This study aimed to investigate the effect of different 980-nm diode laser parameters in hepatectomy. This could provide a clear protocol for using 980-nm diode laser in hepatectomy.

Tungsten disulfide saturable absorbers for 67 fs mode-locked erbium-doped fiber lasers.

In this paper, we demonstrate 67 fs pulse emitting with tungsten disulfide (WS) in mode-locked erbium-doped fiber (EDF) lasers. Using the pulsed laser deposition method, WS is deposited on the surface of the tapered fiber to form the evanescent field. The fiber-taper WS saturable absorber (SA) with the large modulation depth is fabricated to support the ultrashort pulse generation.

Tungsten disulphide for ultrashort pulse generation in all-fiber lasers.

Tungsten disulphide (WS), which exhibits excellent saturable absorption properties, has attracted much attention in the applications of photonic devices. In this paper, WS is applied for the preparation of a saturable absorber (SA). Using the pulsed laser deposition (PLD) method, WS is deposited on the side surface of the tapered fiber.

Ultra-stability Yb-doped fiber optical frequency comb with 2 × 10/s stability in-loop.

We demonstrate a full control ultra-stability Yb-doped fiber optical frequency comb (OFC). The carrier-envelop offset frequency (f) and the repetition rate (f) are locked with the standard phase locked loop (PLL) technique. The f is locked to the radio frequency (RF) synthesizer, and the Allan deviation is 1.

Novel asymmetric representation method for solving the higher-order Ginzburg-Landau equation.

In ultrafast optics, optical pulses are generated to be of shorter pulse duration, which has enormous significance to industrial applications and scientific research. The ultrashort pulse evolution in fiber lasers can be described by the higher-order Ginzburg-Landau (GL) equation. However, analytic soliton solutions for this equation have not been obtained by use of existing methods.

70-fs mode-locked erbium-doped fiber laser with topological insulator.

Femtosecond optical pulses have applications in optical communication, astronomical frequency combs, and laser spectroscopy. Here, a hybrid mode-locked erbium-doped fiber (EDF) laser with topological insulator (TI) is proposed, for the first time to our best knowledge. The pulsed laser deposition (PLD) method is employed to fabricate the fiber-taper TI saturable absorber (TISA).

Generation of dark solitons in erbium-doped fiber lasers based Sb(2)Te(3) saturable absorbers.

Dark solitons, which have better stability in the presence of noise, have potential applications in optical communication and ultrafast optics. In this paper, the dark soliton formation in erbium-doped fiber lasers based Sb(2)Te(3) saturable absorber (SA) is first experimentally demonstrated. The Sb(2)Te(3) SA is fabricated by using the pulsed laser deposition method.

Observation of soliton fission in microstructured fiber.

Femtosecond pulse propagation at λ=802  nm; in microstructured fiber (MF) with zero-dispersion wavelength at 780 nm is studied experimentally and numerically. The temporal and spectral distributions of the femtosecond pulse in MF are demonstrated by using a grating-eliminated no-nonsense observation of ultrafast incident laser light e-fields technique. Soliton fission is directly observed in the experimental results.